Maru_Uchiha
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Well if your doing romance than the choices are Utahime, Shoko and Yuki.
Yes yuta was the first MC and itadori the later. If I'm not mistaken jujutsu kaisen was supposed to be a one shot manga but with its massive success Gege sensei continued it with yuji. For back story of yuta check out the manga jujutsu kaisen volume 0. Also in the anime yuta is mentioned there